Oil-regulating valve.



No. 868,757. PATENTED OCT. 22, 1907.

G. s. BENNETT. OIL REGULATING VALVE.

APPLIOATION FILED 0CIT.1, 1906.

w/fflesses. five/12am 6 h gear ($15. 66/1/16! Z l UNITED STATES PATENT OFFICE.-

GEORGE S. BENNETT, OF SAN FRANCISCO, CALIFORNIA.

OIL-REGULATIN G VALVE.

Specification of Letters Patent.

Application filed October 1, 1906. SerialNo. 336,834.

To all whom it may concern:

Be it known that I, GEORGE S. BENNETT, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented certain new and useful Improvements in Oil-Regulating Valves, of which the following is a specification.

My invention relatesto oil regulating valves, although, of course, the valve may be used to regulate the flow of any fluid, other than oil, where there is considerable wear on the valve parts.

of greater feed. The result of this is that when small quantities of oil are to be fed to the furnace the valve must be nearly closed, but since the oil nearly always contains more or less grit the Wear on the valve seat becomes a serious matter. The form' of opening left at this time with the needle valve is similar to an annulus, but it is such a thin annulus that the oil very easily gums the opening up, and the grit in the oil closes the opening nearly as easily, making it very difficult to feed a regular amount of oil. Then as the wear comesdirectly on the valve seat it is only a short time till the valve must be eground to prevent leakage; and in the case of valves ofother types where it is ,sought to reduce the area of valve seat materialin contact with the oil in proportion to the reduced amount of oil to be fed the valve seat is adjacent the valve opening bringing the wear over the valve seat that must finally close the opening entirely. This causes the valve seat to wear on oneside more than on the side not exposed to the swift flow of the oil and the uneven wear soon causes the valve to leak. The only remedy in these cases is to regrind the valve seat and the valve stem. These various defects are overcome in the present inventionby concentrating the oil feed in a small. aperture having at all times ads-small a valve surface circumscribing the aperture as it is convenient to make. There is in this valve 2. much than in the needle valve of the same capacity. The tendency of the fast moving oil to wear the valve seat I is removed by making the regulating opening and the I regulating opening,

closing opening sufiiciently' distant from each othento allow the opening at the valve seat to be entirely open. before the small regulated stream begins to feed. The consequence of this is that the flow of oil at the valve seat is very much slower than the flow of theoil the and the wear at the latter point is for thesame reason'very much less.

In the drawings which form a part of this specification, and in which like numerals denote like parts;

smaller surface to wear Figure 1 is a side view of the valve, Fig. 2 is a section of the valve in a plane parallel to the plane of view of Fig. 1, Figs. 3, 4 and 5 are views showing a cross section of the valve stem at the different points indicated by the dotted lines at, y and 2 on Fig. 2.'

The numeral 1 denotes the valve stem, 2 the body of the valve, 8 the packing cap and 9 the threads with which the valve stem may be pressed into contact with the valve'seat 3. The bottom of the stem has a seat 4 ground on it to match the seat on the body of the valve. Inside the valve body there is a flange or diaphragm 5 which fits the stem quite closely, but within which the stem is free to slide. This flange or diaphragm 5 fits the stem 1 so closely as to prevent all but an inappreciable quantity of oil from going between it and the stem, except when the cut 6 is in'such a position as it is intended to feed oil. The cut 6 on. the side of the valve stem is at such a height with respect to the end of the stem that is ground to a seat at '3, and the flange 5 that the stem may rise to a full opening at 3, 4, without the cut 6 allowing any oil to escape. I The valve stem is threaded into the screw plug 10 at 9, and the screw plug l0 has a stuffing box with a cap 8. The screw plug 10 must be of such a length that the ring 7 on the valve stem will seat against it to prevent the stem from rising too high and again reducing the flow of the oil.

The regulated feed of the oil begins when the cut 6 rises out ofthe flange 5, and at first the cut is very small, as indicated at 6 in Fig. 3. The area of the cut increases as shown in Figs. 4 and 5, so that as the valve' rises to those points the flow of oil increases.

It will be seen-that the flow of the oil is regulated by a part of the valve :not directly related to that part of the valve intended to entirely out off the flow, so that any wear that may occur at the point of regulation is of little consequence, and does not affect the capability of the valve to deliver a regulated stream of oil. Whatever wear the cut 6 may be subject to does not affectthe valve seat for it is at a full opening at that time,

7 and it is not likely to wear to such an extent that it will allow oilto escape when the valve stemis nearly down, but shouldit do so all that is necessary is to take out the valve stem 1 and regrind it, taking care to make the new surfaces no deeper in the stem than is necessary to cause the cut to be below the flange 5 when the stem ,is seated on the valve body at 4.

This valve possesses the advantage of two valves, one of which is used solely to regulate the flow of the fluid, and the other to entirely cutoff the supply, and it is better than two valves for the reason that the regulation and closure are accomplished by operating the same" stem; It has the further advantage that the flange 5 holds the-stem in place over'the center of-the valve seat, so that nothing short of a very serious bending of the valve stem would pievent it from seating properly.

The shape of the cut 6 is entirely immaterial, it only Patented Oct. 22, 1907. I

being essential that when the valve stem 1 is about to seat on the valve body 2 that the feed shall be substantially cut off by the flange 5, and that the cut dshall be of a variable cross-sectional area in order that the regulation may be accomplished.

Without limiting myself to the precise structure shown, since there may be slight changes therein without departing from the spirit of the claims presented, I claim and desire to secure by Letters Patent of the United States the following: I

1. In a regulating valve, the combination of a valve body having a seat therein, a valve stem having a seat at its end and means to regulate the flow of fluid when the valve is full'op'en at' the valve seat, and a flange on the valve body above the valve seat within which the valve stem slides, substantially as described.

2. In a regulating valve, the combination of a valve body havinga seat therein, a flange projecting from the interior of the body and closely surrounding the valve stem, a valve stem having a seat at its end and a regulating cut of variable cross area at such a height above the end of the stem as to completely open only when the valve is-full open at the valve seat, and means to press the stem against the seat, substantially as described.

3. In a regulating valve, the combination of a valve body having a valve seat within the same, a flange projecting from the interior of the valve body and closely surrounding the valye stem, a valve stem having a seat at its end and a regulating cut at such a height above the end of the valve stem as to open communication between the valve ports only when the valve is wide open at the valve seat, means to press the valve against the valve seat and means to prevent the stem from being raised too high, substantially asdescribed. I

4. In a regulating valve, the combination of a. valve body having a valve seat within the same, a flange projecting from the interior of the valve body and closely surrounding the valve stem, a valve stem having a seat at its end and a regulating cut at such a height above the end of the valve stem as to begin to open only when the opening at the valve seat is wide open, and means to press the valve stem against the valve body, substantially as described.

5. In a regulating valve, the combination of a valve body having a seat therein, a valve stem having a seat at its end and a cut near the seat end of the valve stem, a diaphragm within the valve body and within which the valve stem slides freely, and a ring on the valve stem to prevent it from being raised too high, substantially as described.

G. In a regulating valve, the combination of a valve body having, a valve seat therein, a valve stem having a seat at its end adapted to be pressed against the valve seat and being cut away above the end thereof the cut extending longitudinally of the valve stem and being of less cross sectional area at its top than at pointslower down, a ring surrounding the vnlve stem and means to prevent the stem from being raised too high, substantially as described.

7. In a regulating valve. the combination of a valve, body having a seat therein; a valve stem having a seat on its end to match the body seat and a regulating cut in its side above the stem seat; a flange extending from the valve body and closely surrounding the valve stem, the valve being of greater cross sectionalopening between the seat and the flange than the valve stem, substantially as described.

In witness whereot'l have hereunto subscribed my name in the presence of two witnesses this 24 day of September, 1906.

\ a GEO. S. BENNETT.

Witnesses .T. M. ELLIS,

CAnnos I. Gain-1N. 

